// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef MEDIAPIPE_FRAMEWORK_TOOL_TYPE_UTIL_H_
#define MEDIAPIPE_FRAMEWORK_TOOL_TYPE_UTIL_H_

#include <cstddef>
#include <typeinfo>

namespace mediapipe {
namespace tool {
// Helper method that returns a hash code of the given type. This allows for
// typeid testing across multiple binaries, unlike FastTypeId which used a
// memory location that only works within the same binary. Moreover, we use this
// for supporting multiple .so binaries in a single Android app built using the
// same compiler and C++ libraries.
// Note that std::type_info may still generate the same hash code for different
// types, although the c++ standard recommends that implementations avoid this
// as much as possible.
template <typename T>
size_t GetTypeHash() {
  return typeid(T).hash_code();
}

}  // namespace tool
}  // namespace mediapipe

#endif  // MEDIAPIPE_FRAMEWORK_TOOL_TYPE_UTIL_H_
